A by-election was held for the New South Wales Legislative Assembly electorate of Mudgee on 13 January 1882 because Samuel Terry had been appointed to the Legislative Council to the seat vacated by John Robertson, which would allow Robertson to return to the Assembly as Secretary for Lands.
| Date | Event | |
|---|---|---|
| 29 December 1881 | Writ of election issued by the Speaker of the Legislative Assembly and close of electoral rolls.[1] | |
| 13 January 1882 | Nominations | |
| 20 January 1882 | Polling day | |
| 31 January 1882 | Return of writ |